Hoist hook



P. L. DUKES HOIST HOOK Jan. 26, 1965 2 Sheets-Sheet 1 Filed June 27, 1962 i. lli

Jan, 26, 1965 Filed June 27, 1962 willi P. L. DUKES HOIST HOOK 2 Sheets-Sheet 2 United States Patent Ontice 3,167,345 Patented Jan. 26, 1965 3,167,345 HOIST HOQK Perry L. Dukes, Coulee Dam, Wash., assigner to Bacon- Dukes, Inc., Ephrata, Wash., a corporation of Washington Filed June 27, 1962, Ser. No. 205,624 4 Claims. (Cl. 294-83) The present invention relates to a hoist hook such as one used for elevating a cement hopper or bucket for pouring of cement.

An object of the present invention is to provide a hoist hook which has instant release means which enables the operator of the hoist to engage the bail of a cement bucket, raise the cement bucket and empty it at the desired location, return the bucket to the ground level, and disengage the hoist hook in a single operation.

Another object of the present invention is to provide a hoist hook for engaging the bails or attaching elements of any number of articles, one which is automatic in operation, one simple in structure, one sturdy in construction, and one which is highly eleotive in action.

A further object of the present invention is to provide a hoist hook which may be manufactured at a reasonable cost, one which is foolproof in operation, one which, when engaging the bail of a cement bucket or the like, cannot be released without returning the cement bucket to the ground level.

These and other objects and advantages of the present invention will become apparent from the following description when taken in connection with the annexed drawings, in which:

FIGURE l is a side elevational view of [the hoist hook ofthe present invention with one of the side plates removed therefrom, the hook being shown in position prior to receiving the bail of a bucket,

. FIGURE 2 is a view similar to FIGURE 1 showing the bail of the bucket received in the throat of the hook,

FIGURE 3 is a view similar to lFIGURES 1 and 2 showing the bail in a hoist position,

FIGURE 4 is an end elevational view,

FIGURE 5 is a view taken on the line 5 5 of FIG- URE 3,

FIGURE 6 is a view taken on the line 6 6 of FIG- URE 3,

FIGURE 7 is a view taken on the line 7-7 of FIG- URE 3, and

FIGURE 8 is a View taken on the line 8-8 of FIG- URE 2.

With reference to the drawings in detail, and in which like numerals indicate like parts throughout the several views, the hoist hook of the present invention comprises a pair of vertically disposed plates 10 and 12 arranged in face to face spaced relation. In FIGURES l, 2, and y3, the plate 10 has been removed to show 'the inside of the hoist hook of the present invention.

Registering holes 16 are formed in the upper ends of the plates 10 and 12 for the reception therethrough of an end link 14 of a chain hoist.

The plates 10 and 12 are secured together by vertically extending side plates 18 and 20, a top plate 22, and bottom plates 24 and 26.

The plates 10 and 12 are provided with registering slots 28 and 30, respectively, with the slots 28 and 30 extending from the lower ends of the plates 1i) and 12 and terminating at a point spaced from the upper ends of the plate 10 and 12.

The slotsy 28 and 30 form a vertically disposed throat for receiving therein the bail 32 of a cement bucket or the. like.

' Also connecting the plates 10 and 12 together arechannel members 34 and 36 forming the guide way for the bail 32. Extending between the plates 10 and 12 and having its ends secured thereto is a support bar 38 positioned on one side of the throat and adjacent the lower end part of the throat.

A latch 40 is supported upon a horizontally disposed pin 24 which has its ends `anchored in the plates 10 and 12, as shown in FIGURE 6, the latch 40 being movable about the pin 42 as a horizontal axis from a position in which the portion adjacent one end rests upon the support bar 38 and bridges the throat formed by the slots 28 and 30 to a position in which, as shown in FIGURE 1, the one end portion is in non-bridging relation with respect to the throat.

The latch 40 is normally in the position shown in FIG- URE l and means is provided by the present invention operatively connected to the latch 4t) and engageable with the bail 32 when the bail 32 is wholly received in the throat to shift the latch 40 from the normal position of FIGURE l to the bridging position of FIGURE 2 and of FIGURE 3 for a support of the bail 32 on the latch 40 as in FIGURE 3.

Specically, this means consists in an arm 44 extending over the upper end of the throat and having one end pivostally connected by a pin 46 to the plates 10 and 12 for swinging upward and downward movement of the arm between the positions shown in FIGURES 1 and 2.

Means is provided by the present invention operatively connected to the latch 4l) for holding the latch 40 in the position shown in FIGURE 2 bridging the throat formed by the slots 28 and 30. Specifically, this means comprises a lost motion connection 4S consisting in an upper shank 50 and a lower bar 52 having its upper en provided with a bore 54 receiving the shank 50.

The upper end of the shank 50 is pivotally connected by a pin 56 to the end of the arm 44 remote from vthe pin 46.

The bar 52 is bifurcated for one-half of its length, the lower half, and the end of the bifurcation at the upper end provides a shoulder 58 against which a nut 60 on the shank 50 bears when the shank is in its uppermost' position with respect to the bar 52, as shown in FIG-- URE 2.

The bifurcated lower end of the bar 52 is connected by a pin 62 to the portion of the latch 40 remote from the support bar 38, so that the lost motion connection 48 executes upward and downward movement to responsive to rocking or swinging movement of the latch 40 about the pin 42 as an axis.

The means for holding the latch in the bridging position also includes a pin 64 extending through the arm 44 and engageable with a ledge or hook 66 provided in the intermediate portion of an upright keeper 68 which has its upper end pivotally connected by a pin 70 to the plates 10 an-d 12.

Means is also provided for dislodging the keeper 68 from the pin 64 so that the latch 40 may return from the position shown in FIGURE 3 bridging the throat of the hook to the position shown in FIGURE 1 in which the latch 40 is in the non-bridging position free of the throat. Speciically, this means includes a sloping face of the bar 52.

A roller 76 is journaled on the underside of the arm 44 intermediate the ends thereof and is adaptedto engagethe upper face of the bail 32 when the latter-is inserted into the throat formed by the slots-28 and 30.

A bolt 78 has one end pivotally connected to the platesl 10 and 12 and has a spring 80 eircumposed about the portion of the bolt 78 between `the keeper 68V and a nut v and washer assembly 82 on the bolt 78. The spring 80 serves to bias the keeper 68 to the position in which the i A'What is-claimed is:V

pin 64 vwould be received in the hook66'if the arm; 44ris in the upward position as in FIGURE '2'.Y

A, In operation, .the hook of the present inventionris, lovv.-Y

ered bythe chain links 14` to a position., in which-'the bail 32 of Aa cement bucket or other article is directly bottom plates 24 'and 26se1fv to giide the bail 32 into the throat forfried, by the slots 28 and 30. l Uponlower'- ingof thev hook from the position shown -in FIGURE ll 'to the position shown in FIGURE 2, the bail 32 engages Ythe roller 76 and raises the arm 44 to the'position shown operatively connected torsaid latch a bail 4when said bail is wholly"reeeived in said throat to shift said latch from the normalfposition to the bridging position frsup'p'rtin'g said bil n said latch, and meansl i operatively connected t-o said latch for releasably holding said latch in the bridging position.

2. A hookfora hoistcomprising a'rpair of-vertically 'disposed plates arranged. in face tovface relation, there being a vertically disposedslot in each plate extending from the loweriend "thereof andterminating ata point spaced from the upper. end ofsaid plate, said slots being in' FIGURE 2 at which time the springi) urges the, keeper 68 to Vthe rightin FIGURE 2-so that theY hookl .i

66 engagesthe pin ,64.

, yThe shank 50 ofthe lost motiony connection 48 -is at its extended 'position with Arespect to the bar 52 andjtheY 'Y in registry,withV each other anditogether providing a throat to receive therein the bail of an article to behoisted,

. a' support barextending between and connected to said latch 4llis in the position shown in -FIGUREZ midway Il between thev normal position of FIGURE *nl andV thebridg-v Y ing position of FIGURE 3. lNow'upon raising ,ofV the hook thebail '32 travels4 relativelykdownwardly of' the throat toengage 'the top ofc-the` latch 40 and to force it to the position shown kin FIGURE 3, at -Which Vtime the hook may be raised carrying the bail and bucket with it.

In the position of the elements shown in FIGURES, theractionV ofthe bailV 32 on latch 40 raises barf52 and urges cam ledge 74gagainst face 72 and lshifts keeper 68 i its m-idfportion connected to said plates. r for pivotal move-r plates adjacent to andton` orielside of said throat and inwardly of the lower end/of' said throat, a latch dis l posed `on, theother side ofv4 said throat opposite 'to said support bar and normally having the .portion 4adjacent oneendV spaced above said support barr andr in non-bridging relation with respect to saidfthroat, s aidl latch having ment fromthejnormal positionito a, position with said .one

1 en dY portion resting upon said-"support bar and bridging to the left freeing pin -64 fromhook 66.- Arm 44 is then` 'Y allowed'todrop' in a downward direction to the position i shown Yin FIGURE 3.

funder the action of gravity. The combined Weightof the arm 44, bar '52 and the'right hand portionV of theV lant'c'shf,l

40 exceeds Vthe'weight of the lefthand portion-*ofthe I latch '40:' This results in 'theV latch 40 swinging to the Vnon-yVv bridging position vshown in FIGUREl permitting thehoo'kf Ato-be raised from the bail 32,.

While onlyl preferredembodiment of the present invenv tion is shown and described, other embodiments'are .con-

templated andV numerous changesandtmoditications may be made therein'without departingr from the spirit of the inventiomas set forthjin the appendedy claims.

To release thekbucket fromgthe hook, Vthe operatorof the crane merely/has to lowerV the bucket to'groundlevelV or a similar supporting surface.

The bail' 32 begins tofmoveupV within the'verticallyrlisr!l i V latter may rotate ina :clockwise position as-shownin *A 'L posed throat far enough to clearv the v,latche4t) so -thattheV FIGURE 1.

l Should'the bail 32 move upwardlytoo far and Vengage J Y theroller 76 on the arrn 44 the hoist'hook mechanism will. I then be resetor cocked and in order to'releasethe bailv from the throat and'move thejlatch 40 into the 'position Y shown in FIGURE Y1,"jit'will'be`Y Vnecessary thatthe bail? saidv throat,jsaid latch being movablebytheforce of gravity from `the bridging positionl to `the -normal position,

means operatively Vconnected'to said latch and` engage-V Vable withfa bail'rwh'enl saidy bail is wholly! .received `in said throat to, shift s ai'dflatch flromtlienor'mal position to A'the bridgingV position for supporting saidfbail onv said latch, means operatively 'connected'to'saidi latch forre- *leasably holdingusaid'latch in the bridging position, and

other,meansjcperatively connected ,to the Ylast-mentioned means for 'electingthe' releaseof vsaid latchl upon partially;

7 receiving'said ,bailinsaid throatrr 3. A hook for a hoistcomprising 'zi/pair.overtically" 'disposedl platesarranged in face to facespaed relation,

. n a point spaced from theupper end ofsaid plate, `said-slots il()Y ther'e'bei'n'ga, vertically disposed slot'in each plate ex-y tending from the lower end vthereof andyterminating at beine in @sista/.with each otherend together providing Vva -throatgto-receive -therein the bailY of lan articler to be h9isted, a'fsnpport"bar'extending between vand vconnected to said plates adjacent toand onloneside`v of said throat i.' ."andinwardly ofljthe lower endof"saidfthroat, a latch *disposed* on' thek otherV side olflsaid Ithroat oppositejo said `supportba'r and normally having .the portion adjacent LoneY end spaced above'vvsaid support bar and innon-bridg` ing relation Ywith respect to 4said throat, said latch having Vits midfportion connected to said plates for pivotal move'- rnent romthe normalfposition to a position with said .one-end portionresting 'upon said support bar and br-idgingsaidthroat, "said latch being'movable by4 the 32 be brought into.engagementv with the latch 40 to occupy.

the FIGURE ElV position and then Yrepeatthereleasing cycle and being-lcautiousfnotV toengage theroller376;

1.2V A hook for a hoist comprising YalZpa/iruof vertically Y disposed plates arrangedini face "totace .spaced relation, Y

force 0f gravity from the bridging positionA to the normal y position, an arm extending over,y the upperendof said throat and'hav'ing one endpivotallylconnected to said .platesfor swinging upward andV downward. movementfof Vsaid arm, a'link having oneend pivotally connected to the. other end of said. arrn and having theother end pivthere being a vertically disposedslotrin Veach plate extend- Y i t ing from thelower end thereof and terminating ata pointy Y spaced from the upperend of said'plate',said slots Ybeing `otally connectedftotheiother end of said latch for upward and .downward movement withsaid latehfother end responsivejto movement oflsaidlatch, anuprightgkeeper in registryrwitheach other and together providing'a ,Y

throatto'reeeive therein the bail offanfarticle toV be hoisted, a'su'pportbar extending vbetwe'en'fv and connected `to said, plates adjacentto and orronesideyof saidthrc'vat'r'and'4v inwardly .offthelower end of said throat, a latchdisposed Y -on the other'sideof said throatgopposite to, said ,snppo'rt bar and normally having the portionadjacentgone end having the. iipgperendl pivotally connected to said plates forrswinging movement about a horizontal axis, a-pin 'Y Vivbeingfa.verticallydisposedv slot `in eachV plate extending, rtfrorn the lower endV thereof and terminating at a pointV spaced Yfromthelupper endof sailplate, Isaid slots being extending throughv said arm'adjacent said link and releasjably engaginggwith said'V keeper responsive to down` Y."Ward movement of saidarm, and means on'said link Yengageable withY said keeperresponsive .to upward move-V l gment ofsaid linkandv operabl'ewto release said 'prin from said keeper," f

rh'ookjforrahoist comprisinga pair of vertically' disposed Vplates,.arranged -in tacetotface relation, Vthere and f engageabiewith' throat to receive therein the bail of an article to be hoisted, a support bar extending between and connected to said plates adjacent to and on one side of said throat and f inwardly of the lower end of said throat, a latch disposed on the other side of said throat opposite to said support bar and normally having the portion adjacent one end spaced from said support bar and in non-bridging relaj tion with respect to said throat, said latch having its mid-portion connected to said plates for pivotal movement from the normal position to a position with said one end portion resting upon said support bar and bridging said throat, said latch being movable by the force ofy gravity from the bridging position to the normal posiv' tion, an arm extending over the upper end of said throat and having one end pivotally connected to said plates ikfor swinging upward and downward movement of said arm, a lost motion link having vone end pivotally connected to the other end of said arm and having the other end pivotally connected to the other end of said latch for upward and downward movement with said latch other end responsive -to movement of said latch, an upright keeper having the upper end vpivotally connected to- References Cited in the le of this patent UNITED STATES PATENTS Hett Nov. 21, 1899 Stewart Apr. 24, 1962 

1. A HOOK FOR A HOIST COMPRISING A PAIR OF VERTICALLY DISPOSED PLATES ARRANGED IN FACE TO FACE SPACED RELATION, THERE BEING A VERTICALLY DISPOSED SLOT IN EACH PLATE EXTENDING FROM THE LOWER END THEREOF AND TERMINATING AT A POINT SPACED FROM THE UPPER END OF SAID PLATE, SAID SLOTS BEING IN REGISTRY WITH EACH OTHER AND TOGETHER PROVIDING A THROAT TO RECEIVE THEREIN THE BAIL OF AN ARTICLE TO BE HOISTED. A SUPPORT BAR EXTENDING BETWEEN AND CONNECTED TO SAID PLATES ADJACENT TO AND ON ONE SIDE OF SAID THROAT AND INWARDLY OF THE LOWER END OF SAID THROAT, A LATCH DISPOSED ON THE OTHER SIDE OF SAID THROAT OPPOSITE TO SAID SUPPORT BAR AND NORMALLY HAVING THE PORTION ADJACENT ONE END SPACED ABOVE SAID SUPPORT BAR AND IN NON-BRIDGING RELATION WITH RESPECT TO SAID THROAT, SAID LATCH HAVING IT MIDPORTION CONNECTED TO SAID PLATES FOR PIVOTAL MOVEMENT FROM THE NORMAL POSITION TO A POSITION WITH SAID ONE END PORTION RESTING UPON SAID SUPPORT BAR AND BRIDGING SAID THROAT, SAID LATCH BEING MOVABLE BY THE FORCE OF GRAVITY FROM THE BRIDGING POSITION TO THE NORMAL POSITION, MEANS OPERATIVELY CONNECTED TO SAID LATCH AND ENGAGEABLE WITH A BAIL WHEN SAID BAIL IS WHOLLY RECEIVED IN SAID THROAT TO SHIFT SAID LATCH FROM THE NORMAL POSITION TO THE BRIDGING POSITION FOR SUPPORTING SAID BAIL ON SAID LATCH, AND MEANS OPERATIVELY CONNECTED TO SAID LATCH FOR RELEASABLY HOLDING SAID LATCH IN THE BRIDGING POSITION. 